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Starting a for loop within an if loop [message #57645]

Wed, 19 December 2007 19:57

Mat Smith
Messages: 4
Registered: December 2007

Junior Member

Hi,
I'm trying to write a program with some keywords, so that depending
upon my mood I can alter what it does.

What I want to do is most of the time just run the program, but I want
to include an option to do a for loop.

Basically, I need something like:

IF keyword_set(mc) THEN BEGIN
FOR i=0,n-1 DO BEGIN
t=d[i]
ENDIF

and later in the program

IF keyword_set(mc) THEN BEGIN
ENDFOR
ENDIF

Thus the rest of the program runs normally with and without the for
loop (it just uses t).
However, IDL doesn't understand this - it wants an ENDFOR before the
ENDIF.

Any thoughts on how I can get around this? It's entirely possible that
I'm missing something obvious.
Thanks
Mat

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